package thread;

public class Demo18 {

    public static void main1(String[] args) {
        Thread t = new Thread(new Runnable() {
            @Override
            public void run() {
                System.out.println("1");
            }
        });
        t.start();
        System.out.println("2");
    }
    private static int sum1=0,sum2=0;

    public static void main(String[] args) throws InterruptedException {
      long begin=System.currentTimeMillis();
        int[] arr=new int[10000];
        for (int i = 0; i <arr.length ; i++) {
            arr[i]=i+1;
        }

        Thread t1=new Thread(()->{
            for (int i = 0; i <arr.length ; i+=2) {
                 sum1+=arr[i];
            }
        });

        Thread t2=new Thread(()->{
            for (int i = 1; i <arr.length ; i+=2) {
                sum2+=arr[i];
            }
        });

        t1.start();
        t2.start();

        t1.join();
        t2.join();

        System.out.println("sum1="+sum1);
        System.out.println("sum2="+ sum2);
        System.out.println("sum="+(sum2+sum1));
        long end=System.currentTimeMillis();
        System.out.println("运行时间："+(end-begin)+"ms");
    }

}
